 The GRS assessment is controversial because, among other things, intellectually gifted children at the highest levels are often "not" "teacher pleasers" and can be misunderstood or evaluated with prejudice, especially by laypeople with no expertise in giftedness.Moreover, raters can't access, guess, or factor for certain likable or unlikable characteristics such as hyperactivity or inattention or aggressive/stubbornness.Rating scales, in general, can be subject to rater bias based upon the characteristics of the rater.